Radon zones in South Dakota
Zone 1: 48, Zone 2: 18, Zone 3: 0. A zone is an area estimate; EPA says all homes should be tested.
- Aurora County Zone 1
- Beadle County Zone 1
- Bennett County Zone 2
- Bon Homme County Zone 1
- Brookings County Zone 1
- Brown County Zone 1
- Brule County Zone 1
- Buffalo County Zone 1
- Butte County Zone 2
- Campbell County Zone 1
- Charles Mix County Zone 1
- Clark County Zone 1
- Clay County Zone 1
- Codington County Zone 1
- Corson County Zone 1
- Custer County Zone 2
- Davison County Zone 1
- Day County Zone 1
- Deuel County Zone 1
- Dewey County Zone 2
- Douglas County Zone 1
- Edmunds County Zone 1
- Fall River County Zone 2
- Faulk County Zone 1
- Grant County Zone 1
- Gregory County Zone 2
- Haakon County Zone 2
- Hamlin County Zone 1
- Hand County Zone 1
- Hanson County Zone 1
- Harding County Zone 2
- Hughes County Zone 1
- Hutchinson County Zone 1
- Hyde County Zone 1
- Jackson County Zone 2
- Jerauld County Zone 1
- Jones County Zone 2
- Kingsbury County Zone 1
- Lake County Zone 1
- Lawrence County Zone 2
- Lincoln County Zone 1
- Lyman County Zone 1
- McCook County Zone 1
- McPherson County Zone 1
- Marshall County Zone 1
- Meade County Zone 2
- Mellette County Zone 2
- Miner County Zone 1
- Minnehaha County Zone 1
- Moody County Zone 1
- Pennington County Zone 2
- Perkins County Zone 1
- Potter County Zone 1
- Roberts County Zone 1
- Sanborn County Zone 1
- Shannon County Zone 2
- Spink County Zone 1
- Stanley County Zone 1
- Sully County Zone 1
- Todd County Zone 2
- Tripp County Zone 2
- Turner County Zone 1
- Union County Zone 1
- Walworth County Zone 1
- Yankton County Zone 1
- Ziebach County Zone 2
County not listed? See what we left out and why. Leave your email to hear if this data changes.